Depends how experienced you are at that sort of game control, IMO...
I played years of Freelancer and greatly prefer KB&M for Star Citizen, as the ships in both just fly toward wherever you put the cursor.
In ED, however, the cursor only rotates around the central HUD circle/targetting area. I couldn't figure out how to vary the speed of pitch/yaw. Same for keyboard only, as the commands were either on or off.
I found it such a complete PITA, I just went over to joystick and never had an issue thereafter.
Slightly disappointing, as I was hoping my Mouse Of Many Buttons would provide me a slight advantage with more commands available to both fingers. However, a cheapy basic HOTAS type setup does me pretty well as is (Cyborg FLY-5).